-LRB- CNN -RRB- -- All 77 NATO service members wounded in a Saturday attack against a coalition base in Afghanistan are U.S. troops , a spokeswoman for the International Security Assistance Force said Sunday .

Two Afghan civilians were killed and 25 others also were wounded in the attack , which occurred on the eve of the 10th anniversary of al Qaeda 's attack on the United States on 9/11 , U.S. Army Sgt. Lindsey Kibler said .

None of the injuries is life-threatening , ISAF said , and those wounded are expected to return to duties `` shortly . ''

The truck bombing took place in the central-east province of Wardak , and those killed were Afghan laborers , said Shahidullah Shahid , the Wardak governor 's spokesman .

`` This attack was a high-profile attack . It was a pretty significant suicide vehicle bomb , '' Gen. John R. Allen , commander of coalition and U.S. forces in Afghanistan , told CNN 's Suzanne Malveaux Sunday .

The Taliban claimed responsibility for the assault . NATO 's International Security Assistance Force confirmed the attack was carried out by a Taliban suicide bomber .

Allen said the attack indicates `` much more what the Taliban are unable to do '' than what they are able to do .

`` They have been ejected from the population in so many places around the country that their only ability to influence the battlefield on many occasions is simply to go for a high-profile attack . And that 's how we view this particular attack , '' he said .

Shahid said three people had died , while NATO said two . NATO also said 77 of its personnel were injured , while the provincial government said only 10 people were injured .

It is not uncommon for a local government and NATO to have varying accounts of an attack .

The attacker was driving a truck carrying firewood and detonated his explosives at an entry point to the base , ISAF said in a statement .

`` Most of the force of the explosion was absorbed by the protective barrier at the outpost entrance and though there were a significant number of injuries ... none is immediately life threatening , '' the statement said .

In a video issued by ISAF on Saturday , Allen spoke about the 9/11 anniversary and the long war , saying that while `` there is still much work to be done '' in the fight against Taliban militants , `` we will prevail . '' He also praised the troops from the 49 nations serving in the ISAF coalition .

The protracted war began just a month after the al Qaeda terror network , sheltered at the time by the ruling Taliban militants , attacked the United States on September 11 , 2001 . U.S.-led forces kicked off Operation Enduring Freedom in October and ousted the Taliban .

Coalition and Afghan troops have been fighting the tenacious Taliban militants in the Afghan-Pakistani region .

Allen noted that `` September 11 marks the 10th anniversary of an event that changed the world . ''

Ever since that day , he said , the troops have crippled insurgents and have honored the victims of terrorism worldwide . He said the coalition is committed to making sure Afghanistan is never again a safe haven for al Qaeda .

`` You have helped the Afghan people build their nation , a democratic government and an ever-strengthening security force , '' he said , saying Afghanistan has made advances in security , economic development and governance .

The coalition death toll in the war is nearing 2,700 , according to a CNN count , with the United States sustaining most of the casualties in Operation Enduring Freedom .

August was the deadliest month for U.S. forces in Afghanistan since the conflict began . Seventy-one American troops died in August , topping July 2010 , when 65 troops died , according to the CNN tally .

The surge in U.S. deaths comes as NATO is drawing down and handing over security control to national forces . Some 10,000 U.S. troops are scheduled to depart by year 's end , with all U.S. military personnel out of Afghanistan by the end of 2014 .

CNN 's Joe Sterling , Adam Levine , Matiullah Mati , Claudia Dominguez and Tom Evans contributed to this report .

@highlight

NEW : All of the injured troops are Americans , an ISAF official says

@highlight

At least two Afghan civilians are killed in the attack

@highlight

Gen. John R. Allen : The attack says more about what the Taliban can not do

@highlight

`` Their only ability to influence the battlefield '' is often to go for a high-profile attack , he says